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Finding the Fourth Proportional to 297.92, 409.91 and 291.02

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Solution

The fourth proportional to 297.92, 409.91 and 291.02 is: 400.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.92 : 409.91 = 291.02 : x
  2. Step 2: Convert to fraction form
    297.92/409.91 = 291.02/x
  3. Step 3: Cross multiply
    297.92x = 409.91 × 291.02
  4. Step 4: Simplify right side
    297.92x = 119,289.96
  5. Step 5: Solve for x
    x = 119,289.96/297.92
  6. Step 6: Final answer
    x = 400.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.